Triangle Area Calculator
Compute the area of any triangle by entering the base and height. Uses the standard ½ × base × height formula for fast, accurate results.
Area
Enter values to calculate
How to Use the Triangle Area Calculator
1
Enter the base length of the triangle.
2
Enter the perpendicular height.
3
Click Calculate to see the area.
Frequently Asked Questions
What formula is used?
Area = ½ × base × height. The height must be perpendicular to the chosen base.
Does it work for all triangle types?
Yes — the formula works for equilateral, isosceles, scalene, right, and obtuse triangles as long as you use the perpendicular height.
How do I find the height of a triangle?
The height is the perpendicular distance from the base to the opposite vertex. For right triangles, one leg serves as the height.